hola form

<form class="form-signin" method="POST" action="http://localhost:8080/wii/api/askForImage" enctype="multipart/form-data">
  <h2 class="form-signin-heading">Please send the image</h2>
  <input class="form-control" type="file" name="file" placeholder="File"></input>
  <button class="btn btn-lg btn-primary btn-block" type="submit">Send</button>
</form>